Enable multiplatform builds

.github/workflows/build.yml

@@ -23,17 +23,28 @@ jobs:
  flavor: |
  latest=false
 
+ - name: Set up QEMU
+ uses: docker/setup-qemu-action@v2
+
+ - name: Set up Docker Buildx
+ id: buildx
+ uses: docker/setup-buildx-action@v2
+ with:
+ platforms: linux/amd64,linux/arm64
+
  - name: Log in to Docker Hub
  uses: docker/login-action@v1
  with:
  username: ${{ secrets.DOCKERHUB_USERNAME }}
  password: ${{ secrets.DOCKERHUB_PASSWORD }}
 
  - name: Build and push Docker image
- uses: docker/build-push-action@v2
+ uses: docker/build-push-action@v3
  with:
  context: .
  push: true
+ builder: ${{ steps.buildx.outputs.name }}
+ platforms: ${{ steps.buildx.outputs.platforms }}
  tags: ${{ steps.meta.outputs.tags }}
  labels: ${{ steps.meta.outputs.labels }}
  build-args: |

Dockerfile

@@ -1,5 +1,7 @@
 # Build Stage
-FROM node:alpine as build
+
+# `yarn build` fails on arm64 alpine, so use buster instead
+FROM node:lts-buster-slim as build
 
 RUN mkdir -p /usr/src/app
 
@@ -12,7 +14,10 @@ ENV PATH /usr/src/app/node_modules/.bin:$PATH
 
 COPY ./package.json /usr/src/app/
 COPY ./yarn.lock /usr/src/app/
-RUN yarn install
+
+# increase timeout for arm64
+# see: https://github.com/docker/build-push-action/issues/471
+RUN yarn install --frozen-lockfile --network-timeout 600000
 
 COPY ./public /usr/src/app/public
 COPY ./src /usr/src/app/src